/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:53:10,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:53:10,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:53:10,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:53:10,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:53:10,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:53:10,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:53:10,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:53:10,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:53:10,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:53:10,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:53:10,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:53:10,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:53:10,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:53:10,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:53:10,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:53:10,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:53:10,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:53:10,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:53:10,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:53:10,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:53:10,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:53:10,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:53:10,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:53:10,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:53:10,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:53:10,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:53:10,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:53:10,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:53:10,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:53:10,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:53:10,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:53:10,286 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:53:10,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:53:10,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:53:10,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:53:10,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:53:10,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:53:10,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:53:10,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:53:10,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:53:10,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:53:10,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:53:10,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:53:10,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:53:10,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:53:10,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:53:10,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:53:10,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:53:10,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:53:10,290 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:53:10,290 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:53:10,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:53:10,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:53:10,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:53:10,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:53:10,601 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:53:10,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-05-06 09:53:10,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b550700/920299a4432a4fc496f4b7dc1e6124f0/FLAG592bc5f2b [2021-05-06 09:53:10,990 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:53:10,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-05-06 09:53:10,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b550700/920299a4432a4fc496f4b7dc1e6124f0/FLAG592bc5f2b [2021-05-06 09:53:11,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b550700/920299a4432a4fc496f4b7dc1e6124f0 [2021-05-06 09:53:11,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:53:11,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:53:11,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:11,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:53:11,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:53:11,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665f6375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11, skipping insertion in model container [2021-05-06 09:53:11,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:53:11,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:53:11,564 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2021-05-06 09:53:11,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:11,600 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:53:11,649 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2021-05-06 09:53:11,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:11,677 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:53:11,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11 WrapperNode [2021-05-06 09:53:11,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:11,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:53:11,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:53:11,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:53:11,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... [2021-05-06 09:53:11,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:53:11,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:53:11,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:53:11,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:53:11,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:53:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:53:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:53:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:53:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:53:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:53:11,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:53:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:53:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:53:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:53:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:53:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:53:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:53:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:53:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:53:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:53:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:53:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:53:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:53:11,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:53:11,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:53:12,090 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:53:12,090 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:53:12,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:12 BoogieIcfgContainer [2021-05-06 09:53:12,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:53:12,096 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:53:12,096 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:53:12,101 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:53:12,102 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:12" (1/1) ... [2021-05-06 09:53:12,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:12 BasicIcfg [2021-05-06 09:53:12,115 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:53:12,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:53:12,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:53:12,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:53:12,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:53:11" (1/4) ... [2021-05-06 09:53:12,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e52b482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:12, skipping insertion in model container [2021-05-06 09:53:12,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:11" (2/4) ... [2021-05-06 09:53:12,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e52b482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:12, skipping insertion in model container [2021-05-06 09:53:12,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:12" (3/4) ... [2021-05-06 09:53:12,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e52b482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:53:12, skipping insertion in model container [2021-05-06 09:53:12,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:12" (4/4) ... [2021-05-06 09:53:12,121 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.cJordan [2021-05-06 09:53:12,125 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:53:12,129 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:53:12,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:53:12,157 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:53:12,157 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:53:12,157 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:53:12,157 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:53:12,157 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:53:12,157 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:53:12,158 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:53:12,158 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:53:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:53:12,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:12,173 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:12,174 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:12,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2021-05-06 09:53:12,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:12,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470505620] [2021-05-06 09:53:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:53:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:53:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:12,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:12,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470505620] [2021-05-06 09:53:12,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470505620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:12,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:12,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:53:12,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239789448] [2021-05-06 09:53:12,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:53:12,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:12,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:53:12,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:12,379 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:12,474 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-06 09:53:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:53:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:53:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:12,483 INFO L225 Difference]: With dead ends: 33 [2021-05-06 09:53:12,483 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 09:53:12,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 09:53:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 09:53:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:53:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 09:53:12,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-06 09:53:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:12,515 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 09:53:12,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 09:53:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:12,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:12,517 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:12,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:53:12,517 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2021-05-06 09:53:12,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:12,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659862467] [2021-05-06 09:53:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:12,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569784598] [2021-05-06 09:53:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:12,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:53:12,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:12,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:12,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659862467] [2021-05-06 09:53:12,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:12,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569784598] [2021-05-06 09:53:12,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569784598] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:12,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:12,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:53:12,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701555546] [2021-05-06 09:53:12,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:53:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:12,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:53:12,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:12,816 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:12,826 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-05-06 09:53:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:53:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 09:53:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:12,828 INFO L225 Difference]: With dead ends: 29 [2021-05-06 09:53:12,828 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 09:53:12,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 09:53:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 09:53:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:53:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 09:53:12,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-06 09:53:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:12,833 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 09:53:12,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 09:53:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:12,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:12,834 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:13,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:53:13,057 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2021-05-06 09:53:13,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:13,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088854240] [2021-05-06 09:53:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:13,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:13,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169799217] [2021-05-06 09:53:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:53:13,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:13,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088854240] [2021-05-06 09:53:13,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169799217] [2021-05-06 09:53:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169799217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:13,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:13,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:53:13,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967378619] [2021-05-06 09:53:13,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:53:13,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:13,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:53:13,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:53:13,215 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:13,290 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 09:53:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:53:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 09:53:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:13,292 INFO L225 Difference]: With dead ends: 40 [2021-05-06 09:53:13,292 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 09:53:13,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:53:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 09:53:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-06 09:53:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:53:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 09:53:13,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-06 09:53:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:13,298 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 09:53:13,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 09:53:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 09:53:13,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:13,299 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:13,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:13,518 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2021-05-06 09:53:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:13,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475911591] [2021-05-06 09:53:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:13,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:13,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935414996] [2021-05-06 09:53:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 09:53:13,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:13,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:13,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:13,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475911591] [2021-05-06 09:53:13,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935414996] [2021-05-06 09:53:13,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935414996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:13,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:13,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:53:13,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900279646] [2021-05-06 09:53:13,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:53:13,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:53:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:53:13,968 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:14,336 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-06 09:53:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 09:53:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 09:53:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:14,339 INFO L225 Difference]: With dead ends: 49 [2021-05-06 09:53:14,339 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 09:53:14,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:53:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 09:53:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 09:53:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 09:53:14,345 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-06 09:53:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:14,345 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 09:53:14,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 09:53:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:53:14,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:14,347 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:14,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:14,548 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:14,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2021-05-06 09:53:14,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:14,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011429668] [2021-05-06 09:53:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:14,561 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:14,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455548795] [2021-05-06 09:53:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:53:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:14,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:14,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011429668] [2021-05-06 09:53:14,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:14,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455548795] [2021-05-06 09:53:14,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455548795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:14,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:14,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:53:14,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173928563] [2021-05-06 09:53:14,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:53:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:53:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:53:14,701 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:53:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:14,728 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:53:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:53:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-06 09:53:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:14,730 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:53:14,730 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:53:14,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:53:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:53:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 09:53:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-06 09:53:14,735 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-06 09:53:14,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:14,735 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-06 09:53:14,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:53:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-06 09:53:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:53:14,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:14,736 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:14,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:14,952 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:14,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2021-05-06 09:53:14,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:14,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927188545] [2021-05-06 09:53:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:14,962 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:14,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901417418] [2021-05-06 09:53:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:15,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:53:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:15,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:15,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927188545] [2021-05-06 09:53:15,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901417418] [2021-05-06 09:53:15,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901417418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:15,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:15,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:53:15,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662735065] [2021-05-06 09:53:15,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:53:15,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:15,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:53:15,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:53:15,380 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:15,529 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-05-06 09:53:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:53:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-06 09:53:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:15,531 INFO L225 Difference]: With dead ends: 61 [2021-05-06 09:53:15,531 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:53:15,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:53:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:53:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:53:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:53:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 09:53:15,537 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-06 09:53:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:15,537 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 09:53:15,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 09:53:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:53:15,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:15,538 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:15,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:15,762 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1857795251, now seen corresponding path program 1 times [2021-05-06 09:53:15,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:15,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998629558] [2021-05-06 09:53:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:15,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:15,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322526645] [2021-05-06 09:53:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 09:53:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:15,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:15,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:15,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998629558] [2021-05-06 09:53:15,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:15,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322526645] [2021-05-06 09:53:15,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322526645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:15,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:15,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:53:15,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762938738] [2021-05-06 09:53:15,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:53:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:53:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:53:15,995 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:16,199 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-05-06 09:53:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 09:53:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 09:53:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:16,200 INFO L225 Difference]: With dead ends: 64 [2021-05-06 09:53:16,200 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 09:53:16,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:53:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 09:53:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 09:53:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:53:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-06 09:53:16,206 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-06 09:53:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:16,206 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-06 09:53:16,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-06 09:53:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:53:16,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:16,207 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:16,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:16,429 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2004143825, now seen corresponding path program 1 times [2021-05-06 09:53:16,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:16,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183127617] [2021-05-06 09:53:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:16,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:16,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879864893] [2021-05-06 09:53:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 09:53:16,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:16,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:16,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:16,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183127617] [2021-05-06 09:53:16,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:16,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879864893] [2021-05-06 09:53:16,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879864893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:16,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:16,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:53:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244527050] [2021-05-06 09:53:16,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:53:16,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:53:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:53:16,611 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:16,971 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2021-05-06 09:53:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:53:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 09:53:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:16,972 INFO L225 Difference]: With dead ends: 77 [2021-05-06 09:53:16,972 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 09:53:16,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 09:53:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-06 09:53:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:53:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-06 09:53:16,978 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-06 09:53:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:16,978 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-06 09:53:16,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-06 09:53:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:53:16,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:16,979 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:17,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:17,185 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1116640144, now seen corresponding path program 1 times [2021-05-06 09:53:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:17,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903624643] [2021-05-06 09:53:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:17,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:17,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484637583] [2021-05-06 09:53:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:17,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 09:53:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:17,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:17,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:17,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903624643] [2021-05-06 09:53:17,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:17,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484637583] [2021-05-06 09:53:17,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484637583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:17,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:17,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:53:17,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790772937] [2021-05-06 09:53:17,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:53:17,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:17,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:53:17,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:53:17,494 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:17,794 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2021-05-06 09:53:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:53:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 09:53:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:17,796 INFO L225 Difference]: With dead ends: 85 [2021-05-06 09:53:17,796 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 09:53:17,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 09:53:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-06 09:53:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:53:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-06 09:53:17,803 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-06 09:53:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:17,803 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-06 09:53:17,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-06 09:53:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:53:17,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:17,804 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:18,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 09:53:18,019 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1454559031, now seen corresponding path program 1 times [2021-05-06 09:53:18,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:18,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356358099] [2021-05-06 09:53:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:18,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:18,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548441888] [2021-05-06 09:53:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:53:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:18,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:53:18,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:18,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356358099] [2021-05-06 09:53:18,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:18,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548441888] [2021-05-06 09:53:18,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548441888] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:18,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:18,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 09:53:18,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144459232] [2021-05-06 09:53:18,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:53:18,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:53:18,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:53:18,193 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:53:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:18,273 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-05-06 09:53:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:53:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-06 09:53:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:18,275 INFO L225 Difference]: With dead ends: 90 [2021-05-06 09:53:18,275 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 09:53:18,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 09:53:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-06 09:53:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:53:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-06 09:53:18,295 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-06 09:53:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:18,296 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-06 09:53:18,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:53:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-06 09:53:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 09:53:18,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:18,297 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:18,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:18,513 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash 482870923, now seen corresponding path program 1 times [2021-05-06 09:53:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505476251] [2021-05-06 09:53:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:18,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:18,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269348344] [2021-05-06 09:53:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:53:18,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:18,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 09:53:18,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:18,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505476251] [2021-05-06 09:53:18,741 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:18,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269348344] [2021-05-06 09:53:18,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269348344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:18,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:18,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:53:18,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682453275] [2021-05-06 09:53:18,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:53:18,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:18,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:53:18,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:53:18,742 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:53:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:21,244 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2021-05-06 09:53:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:53:21,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-06 09:53:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:21,246 INFO L225 Difference]: With dead ends: 101 [2021-05-06 09:53:21,246 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 09:53:21,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:53:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 09:53:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-05-06 09:53:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:53:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2021-05-06 09:53:21,252 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 35 [2021-05-06 09:53:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:21,253 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2021-05-06 09:53:21,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:53:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2021-05-06 09:53:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 09:53:21,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:21,254 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:21,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 09:53:21,465 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash 189467916, now seen corresponding path program 1 times [2021-05-06 09:53:21,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:21,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589421273] [2021-05-06 09:53:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:21,472 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:21,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110966900] [2021-05-06 09:53:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:53:21,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:21,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:53:21,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:21,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589421273] [2021-05-06 09:53:21,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:21,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110966900] [2021-05-06 09:53:21,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110966900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:21,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:21,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:53:21,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556051305] [2021-05-06 09:53:21,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:53:21,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:53:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:53:21,667 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)